Grease pump



Jan. 3l, 1928.

D. M. HEsToN GREASE PUMP lFiled Oct. 20, 1925 www Sie

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Patented Jan. 31, 1928.

lTED STATES DARVIN M. I-IESTON, OF EVANSVILLE, IllDIr-HJA.k

GREASE PUMP.

:1a-f1.' Application led October 2G, 1925.

This invention relates to pumping appr.- ratus and has tor its primeobject to providr` a pump designed 'tor the extraction ot grease andsimilar matter ilrom the reservoirs of internal combustion engines andthe e.

A further object ot the invention is the. provision oi a pump ol theabove character constructed so as to be operated with comparativelylittle etlovrt.

Still a 'further object oic the invention is the provision of a pun-1pojt a simple and durable nature formed so as to permit convenientremoval oi grease and like matter from the diiierential housing o ndlike grease containing structures olf automobiles and similar vehicles.

Another object ofthe invention is the provision ot a pump ot the abovecharacter which will operate eiiicieutly and which may be placed uponthe market at a comparatively low cost.

@ther objects and advantages oit this invention will become apparent asthe description progresses.

In the accompanying drawing forming a part oi this specification and inwhich like reference characters are employed to designate correspondingparts throughout the same:

Figure 1 is a longitudinal sectional view through a pump structureconforming to my invention,

Figure 2 is a top plan view of the same with th handle member removed,and

Figure 3 is a perspective view of a. valve casingforming a part of myinvention.

In the drawing, wherein for the purpose of illustration is shown thepreferred embodiment ot my invention, the numeral 5 generally designatesa tubular casing forming the cylinder of my improved pump, this casingbeing open at its extremities and eX- ternally screw threaded adjacentthereto. The upper portion ot the cylinder 5 is provided with a circularopening to permit connection ot an outlet tube 6, open at its eX-tremities and secured to the cylinder so as to communicate with theinterior thereof. It is readily apparent, that the outlet tube 6 is or'substantially decreased dia-meter with reference to the cylinder 5, andthe matter Yforced from the cylinder is conveyed into a suitablecontainer through this tube.

Mounted so as to reciprocate in the customary manner in the cylinder 5is a longitudinal piston rod 7 preferably of circular Serial No. 63,741.

cross section externally screw threaded at its upper end and providedwith a reduced screw threaded projecting pin 8 at its lower end. Securedto the lower end of the piston rod l' in the usual way is a suitablepiston structure embodying a packing ring 9 oit substantially circular''formation and provided with an upturned {ia-nge., this packing ringbeing preferably constructed ot leather or similar material. Mountedabove the packing ring 9 so as to abut the enlarged portion oi thepiston rod 7 is a washer 10 while an enlarged washer 11 of metallicconstruction is mounted in contact with the lower portion ot the packingring. These elements are tightly secured on the lower end of the pistonby a nut 12 which is threadedly engaged with the reduced pin 8 andretains the packing ring 9 securely in position. This constructionprovides a piston ot' yieldable structure, the upturned flange ot thepacking ring 9 being adapted to tightly engage the sides of the cylinderon the upward stroke of the piston rod.I but to Contact appreciably onthe downward stroke so that an annular recess is provided between thepacking ring and the cylinder palle to permit the passage ot matterthere- Threadedly mounted on the lower end oi the cylinder 5 is atapered connecting sleeve 13 provided at its upper end with aninternally screw threaded flange 14 and an intermediate tapered bodyportion. The lower end ot the sleeve is provided with a reduced nipple15 internally screw threaded tor engagement with a conducting tube 16.This conducting tube 16 may be of any desired construction preferablyformed to assume a semi-circular curve, as shown in the drawing. Thisconstruction ot the tube will permit the pump to be convenientlyconnected with the dillerential housing of a vehicle or other reservoir.The center of the connecting sleeve 13 is, of course, provided with alongitudinal bore 13 communicating with the interior of the cylinder,through which the grease or other matter is drawn through theintermediacy of the conducting tube 16.

The upper end ot the cylinder 5 is enclosed by a 'flanged cap 17threadedly engageable with the cylinder and provided with a centralopening about which is formed an inwardly extending packing collar 18.As it is desirable to pro-vide suitable packing at the upper end of thecylinder to prevent .llA

lealrazee of matter through the piston rod opening, an annular plate 19is positioned on the upper end of the cylinder provided at its centralportion with a comparativelj,7 large opening. Suitable packing EEO ismounted liietween the plate 19 end the oep 17, the paolo ino; ring` 18formed on the cap tending to torce the packing; through the openingrFormed in the plate 1 9 so as to tightly enihrace the pieton rod T. Inthis connectionv` it will be noted that the piston rod carries on itsupper end a conveniently formed handle 2l et courentionfil design bymeans ot which the pieton rod may be conveniently actuated. t

From the foregoing; construction, it u'ill he readily noted that thepiston rod 7 loinfitudinally movable through the cylinder Fiend is ot'suliicient length to entend through the greater portions thereof;

In order that the grease or other nuitter may be efficiently pumpedthrough the cylinder, the leiter portion thereof provided with asuitable valve structure cmliiodi'ing a disk Valve 22 ol metallicconstruction, erranfged so as to normallyv rest on the upper portion elthe connecting; sleeve 13 and close the upper end of the bore therein.This valve is retained in position by means of a valve ceeing or cage Q3embodying a circular body plate 2li provided with outwardlyv flaredtapered side ribs E25, the lower e1;- tremities ot the ribs 25 beinelbent outwardlyy in a parallel plane with the body plate 2l so as to hefirmly secured between the lower end ot the cylinder und the connectingsleeve. This structure provides a cage ol,Y perforated' constructionforming V-shaped recesses about the sides of the cage for the passage ofgrease or other matter being discharged through the pump. llhe center etthe cage body plate :2l is provided with a comparatively small openingS26 so as to l`u eiliete the operation of the valve.

In use, the eonduoting;d tube 1G of the pump structure `is insertedthrough the opening in the dillerential housing' or other greasecontaining reservoir and the piston 7 reciprocally operated. During` theintake Stroke, that is, While the piston is being elevated in thecylinder, the suction formed in the cylinder between the outlet `end andthe piston Will cause the disk valve 22 to be raised so as to uncoverthe here 13 :formed in the connecting" sleeve. The prem-se will then bedrawn through this` here and through the valve cage into the cylinderand practicallyY lill the cylinder. As the piston urged on its returnstroke into the cyliiider, the peeleing ring 9 will contract so as todiscngaffe the side walls of the cylinder and permit the pesano ot themulti-ir t-liereabout. The grease is prevented from disiehai'o'iug oulwardljr through the conducting tube hy the action oli' the dish valve Q2which will be forced tightly upon its scat e'o :is lo coter the bore 123termed in the sleeve lll. It is therefore obvious, that the grease uillhe l'orced toward the discharge end ol the c ifliuder und will issuethrough the outlet tube t3 into a suitahle coutuiiuu'. llepeuteil openation ot the piston will quicklyY drain the grease container so that theold groene uniy he convenientlyY replaced with 'llesli lulu-leoni. Fromthe foregoing; description. and the drau'ino; it will be readilyv .eeenthat :i com parativclj,T simple und eon'ipuct pump sti-iur-` tureprovided dcnipjued to :is to he anew ulaelured at ai lou" cost andarranged .eo u1=l lo perliorui the lubricant draining oliziuum quicklyand clllciently.

It is to he understood that the forni ol my intention herewith shown unddecl'iluul is, susce'itillale oil nuulilication und thut variouschanger: as to the shape, f-ize und arrende meut oit parts mai7 beresorlilul lo util. i .ul depailin; l'roin tl i spirit ol' the inventionor the scope ot the :'iuhjoiued claims;

Hating' thus dcscrilied nu; invention, l claim:

l, A pump vulve includ; jg :i llutrlieli adopted to normally cioe neintake opening of e pun'1p and a guide cepe includiup; :i circuler bod)vplate und u pl alitr ol ungularly arranged ribs adapted lo providesupports :tor the hodj,v secured to the hollow ol the pump and havii'igaper ures therein to permit the passage oil' matter tlun'etluough.

2. In coinliiina'tirun a cylinder, au inlet sleeve threaded to one oudol the cilinder,r and a valve structure associated therewith including aValve rctainiru;` dish hoi'inlr spaced ribs,portionsy oliwhich beingclanipeil between said cylinder und sleeve.

In testimony whereof I allie; my sio'uatlu'e.

Drinnen n'. nnsion.

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